package com.myth.safety.exer;

/**
 * 银行有一个账户。
 * 有两个储户分别向同一个账户存3000元，每次存1000，存3次。每次存完打印账户余额。
 *
 * 分析:
 *     1.是否是多线程问题?是，两个储户线程
 *     2.是否有共享数据?有，账户（或账户余额)
 *     3.是否有线程安全问题﹖有
 *     4．需要考虑如何解决线程安全问题?同步机制
 *
 *
 * @author
 * @create 2021/8/9
 */

class Account {
    private double balance;

    public Account(double balance) {
        this.balance = balance;
    }

    //存钱
    public synchronized void deposit( double amt){
        if(amt > 0){
        balance += amt;

            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }

            System.out.println(Thread.currentThread().getName()+":存钱成功。余额为:"+balance);
    }
}

}

class Customer extends Thread {
    private Account acct;

    public Customer(Account acct) {
        this.acct = acct;
    }

    @Override
    public void run() {
        for (int i = 0; i < 3; i++) {
            acct.deposit( 1000);
        }

    }
}

public class AccountTest {
    public static void main(String[] args) {
        Account account = new Account(10);
        Customer c1 = new Customer(account);
        Customer c2 = new Customer(account);

        c1.setName("用户1");
        c2.setName("用户2");

        c1.start();
        c2.start();



    }

}
